Stoves and fireplaces can be made of various types of materials. But to prolong the life and maintain the appearance of these structures will help heat-resistant varnish. Such a finishing lining must have fireproof and fireproof characteristics.
general information
The varnish is heat-resistant, it is also refractory, - a solution that does not support combustion. It includes organosilicon resins diluted in solvent. Most often it has a transparent color, but sometimes impurities are added to obtain the desired shade.
Use it for processing various types of surfaces, including for brick, stone, metal, ceramic tiles, plaster. In some cases, they are also used to cover wooden substrates.
Heat-resistant varnish gives shine and preserves the original texture, color. Protects from fire and destruction of the facing layer.
Why varnish stoves and fireplaces
At temperatures above 80 ° C, dust is sublimated, and harmful substances are released. To preserve the cleanliness and environmental friendliness of the environment inside the buildings, paint and varnish solutions are used to facilitate the care of fireplaces and stove structures. It is also recommended to make designs with simple geometric shapes, which prevents the accumulation of small dust particles in fractures. These measures help to avoid harmful effects, and also facilitate the maintenance of structures. It is much easier to remove dust and dirt from the varnished surface. In addition, the risk of fire is reduced.
Consideration should be given to varnish options.
Varnish KO-85 - specifications
Such a solution is based on polyphenylsiloxane and polybutyl methacrylate resins. This heat-resistant varnish has the following advantages:
- It is possible to work at subzero ambient temperatures.
- Gives surfaces enhanced water resistance even when applying a single coat.
- Resistance to high temperatures. In the process, the protective film does not burst, does not slip.
- It withstands temperature differences from -40 to 300 ° C.
- It is used to process not only the masonry itself, but also the joints, which also prevents the destruction of structures.
- High drying speed - up to 30 minutes. Depending on environmental conditions. Recommended temperature is + 20 ° C.
- It is steady against ultra-violet radiation.
- High refractory properties. Does not support combustion.
- Durability, retains its properties for 20 years.
- Lack of pungent odors. After complete drying, they disappear completely.
As you can see, the varnish KO-85 has the required characteristics in order to apply it in aggressive environments.
Lac-815 - specifications
This solution is based on polyphenylsiloxane and glyphthalic resins.
After drying, it differs in the same properties as the previous composition, but it has a number of differences:
- The curing time of one layer is from 30 minutes to 2 hours. Full hardening occurs after calcination of the surface at a temperature of + 150 ° C.
- Withstands higher operating temperatures - up to 350 ° C. This heat-resistant varnish for stoves is suitable like no other. They can also cover the furnace zone, since it has greater heat resistance.
- It withstands temperature differences from -40 to 350 ° C.
- The service life of these coatings is up to 15 years.
Some of the characteristics have been changed for the better. Some features are controversial, such as longer solidification times.
Silicone Enamel
The basis of such funds is varnish-85 or 815, but with the addition of aluminum powder. Given the characteristics, it is possible to highlight the advantages that such enamels possess:
- Resistant to sudden changes in temperature. They withstand a range of up to 60 ° C.
- Water resistance, which is characteristic of the varnishes underlying the composition.
- Resistant to aggressive environment. Do not change color under the influence of ultraviolet radiation.
- A wide range of colors.
- They can be used in the range from -20 to + 40 ° .
- High anticorrosive properties.
As you can see, organosilicon enamel retains almost all the positive properties of its bases.
Therefore, such mixtures are widely used both in industry and in private construction. Most often they are used for outdoor work. If applied indoors, respiratory protection should be considered.
Fields of application
Any organosilicon varnish is used to cover the outer surface of stoves and fireplaces in residential premises, as well as in baths and saunas. Moreover, it can be used for street ovens, barbecue. This allows the waterproof and refractory characteristics of such products. Moreover, the described varnishes are often used for outdoor applications, because they are resistant to ultraviolet radiation, and at the same time they are not afraid of direct rainfall.
Although such a varnish has been developed for the fireplace and stove as an option for external and internal decoration, it is often used for other materials. This is wood, plaster, concrete, stone. It should be noted that such compositions are still positioned as heat-resistant varnish for metal. They perfectly protect surfaces from corrosion. Therefore, they often cover the metal parts of stoves and fireplaces.
These solutions are used as modifying additives in alkyd, acrylic and other compositions, which gives them some of the advantages, including resistance to aggressive environments.
Heat-resistant varnish-85 is used as the basis for quick-drying enamel KO-814.
And the product with the marking 815 is the basis of refractory enamel 813. These solutions and their derivatives are used in the processing of oil pipelines, machine mechanisms, and automobile parts operating at elevated temperatures.
Work technology
It should be understood that, as in the case of any finishing finish, the surface is prepared before coating. Thoroughly cleaned from pollution, dust. Metal parts degrease. It is recommended that the base be primed before the finish. Next, prepare coatings for application. Organosilicon varnish is thoroughly mixed until the formation of bubbles stops. You can do the work with a brush, roller, pneumatic sprayer.
The first coat is applied. Drying time is given. In the case of varnish-85, it will take only 20-30 minutes to wait. For coatings with marking 815, the pour time is from 30 minutes to 2 hours, depending on the ambient temperature.
It is recommended to apply up to 3 layers. It should be noted that varnish-815 completely hardens under the influence of a temperature of 150 ° C, so calcination will be required.
The total film layer should not exceed 40-50 microns. If this indicator is exceeded, there is a risk of coating cracking.
Selection recommendations
In fact, the market is not limited only to the above compositions, there are others.
For example, latex, acrylic, polymer. When choosing a solution, the following data should be considered:
- The location of the object to be processed. Will it be indoors or outdoors. Or maybe a bathhouse or a sauna. Depending on this, attention should be paid to moisture resistance, resistance to ultraviolet.
- The temperature to which the product will be subjected, design. Pay attention to the permissible operating temperature range of paintwork materials.
- The presence of odors, curing rate.
- The material to be protected. Pay attention to the adhesion of solutions with one or another base. You may need to buy a primer that is compatible with both the base and the coating solution.
If you choose the right paint composition, then it will be able to provide long-term protection of the surface from the effects of various factors.
In favor of heat-resistant varnishes, we can say that they are made in accordance with GOSTs, which means that they are fireproof. This is one of the main qualities required for the finish coating of stoves, fireplaces.
So, we found out what heat-resistant varnish is.